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2.6.3.2 Digital Output Function Calls
int rn_digOutConfig(int handle, int senddata);
Configures output channels 0 to 15 to a “safe state” on power-up for sinking or sourcing outputs. The
channels are set to a high impedance at power-up. The factory default sets the safe state as zeros, consid-
ered a disabled state for sourcing outputs.
This function will first compare the requested states and values in the “safe state” register. If there is a
match, the requested states will not be rewritten to the device to eliminate unnecessary writes. Otherwise
this function saves states to flash, and therefore should be called only once. A hardware reset, rn_
reset() , and a read of the reset register, rn_rst_status() , must be issued after this function is
called.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to estab-
lish the handle.
senddata is a bitwise logic representing a state of 0 or 1 for each channel. The most significant bit
represents channel 15.
0 = disable sourcing outputs
1 = disable sinking outputs
RETURN VALUE
The status byte from the previous command. -1 means that device information indicates the Digital I/O
Card is not connected to the master.
SEE ALSO
rn_digOut
int rn_digOut(int handle, int channel,
char senddata, int reserved);
Sets the state of a digital output.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to estab-
lish the handle.
channel is the output channel number (0 to 15)
senddata is the output data.
1 = set bit
0 = reset bit
reserved is reserved for future use. Set to 0.
RETURN VALUE
The status byte from the previous command. -1 means that device information indicates the Digital I/O
Card is not connected to the master.
SEE ALSO
rn_digOutConfig, rn_digBankOut, rn_digIn
User ’s Manual
35
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